Iieney william jones



(No Model.)

H. W. JONESL APPARATUS FOR ADJUSTING'AND RETAINING THE SIGHTS FOR ORDNANGE. No 367,815. Patented Aug. 9, 1887.

FIGS.

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N. PETERS. Pmwmhn n her, Wnhingwn, D. C.

UNITED STATE PATENT OFFICE.

HENRY NVILLIAM JONES, OF PLUMSTEAD, COUNTY OF KENT, ASSIGNOR TO THE NORDENFELT GUNS AND AMMUNITION COMPANY, (LIMITED,) OF

\VESTMINSTER, ENGLAND.

APPARATUS FOR ADJUSTING AND RETAINING THE SIGHTS FOR ORDNANCE.

SPECIFICATION forming part of Letters Patent No. 367,815, dated August 9, 1887.

Application filed January 18, 1887. Serial No. 224,698. (No model.) Patented in England June20, 1884, N0. SL217.

To all whom, it may concern.-

Be it known that I, HENRY WILLIAM JoNEs, a subject of the Queen of Great Britain, residing at Tenbury Villa, 119 Herbert Road, Shooters Hill, Plumstead, Kent, England, mechanical engineer, have invented certain new and useful Improvements in Apparatus for Adjusting and Retaining the Sights for Ordnance, applicable in other cases where parts of mechanism require to be moved and retained, (for which I have received Letters Patent in Great Britain, No. 9,217, dated th June, 1884,) of which the following is a specification. 1 The drawings show the apparatus as ap plied to the tangentscale of a sight for ordnance.

Figure 1 is a side view. Fig. 2 isa front view,showing part in section. Fig. 3 is aside View with the cover removed. Fig. 4 is a view of the interior of the cover, showing the inclined slots. Fig. 5 is a sectional plan.

The same letters refer to the same parts in each figure.

A is the adjustable part, which, as shown, is the ordinary sight-bar or tangent-scale, which may be made either square, rectangular, triangular, or of any other sectional form. This bar is provided with a rack gearing with a pinion, B. p

G is the holder or buckle, which drops into a socket at the side of the gun near the breech, and is kept in its placeby means of the springpin end of axle D, which snaps into the recess in the body of the gun E or sight-carrier, and is easily withdrawn by pulling the wheelcover at the opposite end, compressing the spiral spring F, which surrounds the axle and bears at one end against a collar, G, loose on. the axle and bearing against the pinion B.

H is a screwed nut to secure the spring in its place.

I is a circular plate fastened to the holder 0, with a fixed V-grooved wheel. Two springa5 controlled cam-shaped friction clips or pawls,

K K, are connected with the axle in the following way: A double arm, J J, is fixed to the axle and carries these pawls.

L is a spring secured to the tail-piece M of the double arm, to insure the clips being kept in contact with the grooves.

A hand-wheel or clamp-box loose on the axle has connection with the pawls in the following way: N N are studs or pins on the pawlarms entering the slots 0 O of the camplate R, attached to the inside of the cover P,

which forms part of the hand-wheel or clampbox, and is milled on the outer edge for facil-' ity of manipulation, and is free to turn on the axle, but controlled by the studs or pins N N. Q is a loose collar with a pin to secure it.

The action is as follows: The sight-bar, when adjusted for any desired elevation, acts by gravity on the pinion, tending to run down; but the spring keeps the clips in contact with 6 5 the surface of the groove, and they jam tightly from their eccentric form. The greater the disposition of the bar to run down the more tightly does the clip which restrains that direction grip. On the other hand, any movenient of the bar in the opposite direction due to a desire on the part of the bar to jump up ward under the shock of discharge of the gun is immediately met and counteracted by the opposite clip. In turning the wheel I? in or- 7 der to raise or lower the bar A the clips K K are withdrawn or disengaged by the action of the slots O O of the cam-plate, which engage the studs N N and lift the two friction-clips or pawlsv K K and allow the pinion B to turn freely in either direction, and thus to actuate the bar A as required. Directly the hand is removed the clips are forced into the groove by the spring L, and are ready to clamp tightly the bar immediately it is disposed to move either upward or downward under the shock of discharge of the gun or any other influence apart from the legitimate motion of the hand-wheel. This brake can be applied to the elevating and traversing gear of gun- 0 carriages, also to cranes and combinations of wheel-work gearing. In some cases, where locking in one direction will suffice, only one pawl, K, is required.

Having now particularly described and as- 5 certained the nature of my said invention and in what manner the same is to be performed,

I declare that what I claim is- 1. In apparatus for adjusting and retaining the sights of ordnance or other like adjustable parts, the combination of the adjustable part, the axle geared therewith, the spring-controlled pawl (or pawls) connected with the axle, and the hand-wheel loose on the axle and having connection with the pawl, (or pawls,) substantially as set forth.

2. In apparatus for adjusting and retaining the sights of ordnance or other like adjustable parts, the automatic friction brake or clamp, contained within a wheel-boX,'and consisting ofa-one or more eamshaped pawls engaging by frictional contact with'the circular V-shaped groove and actuated by inclined slots, and a spring or springs, substantially as set forth.

3. -In apparatus for adjusting and retaining an ordnancesight, the combination of the sight-bar A, the pinion B, gearing therewith, the holder 0, the axle D,sliding longitudinally in the holder, and thespring F, the whole arranged substantially as and for the purpose set forth.

HENRY XVILLIAM JONES.

\Vitnesses:

TALFOURD HUGHns,

Solicitor, l Voolwich, ROBERT GOODMAN ROBERTS,

Clerk to Mr. Tell/010ml JI hes. 

